Satisfy ZeroGPU startup check for HF Space

The Space is on ZeroGPU, whose runtime requires at least one
@spaces.GPU-decorated function at import time. Add the decorator
to the compute path and the spaces package to requirements.

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -11,6 +11,7 @@ from __future__ import annotations
 
 import gradio as gr
 from huggingface_hub import HfApi
+import spaces  # noqa: F401  — present so ZeroGPU detects a GPU-aware Space
 
 from vramcalc import (
     QUANT_BPW,
@@ -128,6 +129,7 @@ def _parse_gpu_list(text: str) -> list[float]:
     return out or [24.0]
 
 
+@spaces.GPU
 def compute(
     arch_fields,
     quant, n_ctx, cache_dtype, flash_attn, compute_dtype,

requirements.txt

@@ -1,3 +1,4 @@
 gradio==6.20.0
 huggingface_hub>=0.20.0
-requests>=2.28.0
+requests>=2.28.0
+spaces>=0.26.0